JP2541516Y2 - Cooker - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooking device provided with a heater.

[0002]

2. Description of the Related Art Conventionally, in a heating cooker equipped with a heater, the driving of the heater is controlled in accordance with the temperature of the wall surface of the heating chamber and a preprogrammed heating time during cooking such as grill cooking. .

[0003] However, in foods in which the correlation between the wall temperature of the heating chamber or the heating time and the scorching of the food has been confirmed,
Although a sufficient finished state can be obtained by the heater control described above, when cooking other foods, or even for foods for which correlation has been confirmed, the finishedness may be incorrect if the conditions such as freshness and water content are different. , There is a risk of cooking failure.

Therefore, in the prior art, when cooking with browning, smoke generated from food when the heater is heated is directly detected to control the calorific value of the heater. For example, Japanese Utility Model Application Laid-Open No. 55-50442 discloses the method. Is shown in

More specifically, a plurality of smoke introduction holes are provided in the ceiling or upper part of the side wall of a cooking room in which a heater is installed, and a smoke sensor is disposed behind the small holes, and the detection level of the smoke sensor is set in advance. This is a configuration in which the drive of the heater is controlled by comparing the level with the burn amount setting volume.

[0006]

However, in the cooking device disclosed in the above-mentioned publication, in order to increase the sensitivity of smoke detection, a smoke sensor is provided on the back side of the smoke introducing hole in close proximity to and opposed to the small hole. Because of the installation, the smoke sensor blocks the small holes, the heating room is not exhausted smoothly, and the heating room is more likely to be filled with smoke. It can adhere to the smoke sensor through the hole. If the smoke sensor is installed away from the small holes in order to avoid such a problem, the detection sensitivity of the smoke sensor is significantly reduced, which results in cooking failure.

The present invention has been made in consideration of such problems of the prior art, and has as its object to control the driving of a heater by detecting smoke generated from food. In addition, the smoke sensor can be placed in a position where the exhaust passage is not blocked and there is no fear of scattering of food juice, etc., smoke can be effectively detected and a stable finish of food can be obtained , and the space is effective. It is to provide a heating cooker used for the above.

[0008]

In order to achieve the above object, in a cooking device according to the present invention, a top plate of the heating chamber is provided.
Heater cover with a trapezoidal cross section
And disposed in the heater cover and through the opening.
A heater for heating food Te, the heat on the upper side of the heating chamber
An exhaust duct disposed in a direction intersecting the data cover and communicating with an exhaust port at a ceiling, and an exhaust air passage of the exhaust duct.
Of, formed in the upper position of the heater cover, the sensing space air passage cross-section is not narrower than the other portion, facing the sensing space
A light-emitting element of a smoke sensor , which is disposed together and detects the smoke introduced into the exhaust duct and controls the driving of the heater;
And a light receiving element .

[0009]

In the above-described configuration, when the food contained in the heating chamber is heated by the heater and smoke starts to be generated from the food,
This smoke is introduced into an exhaust duct through an exhaust port on the ceiling, discharged to the outside through a detection space, and is detected by a smoke sensor installed in the detection space.

In this case, since the detection space is disposed in the middle of the exhaust duct, even if food juice or the like scatters toward the exhaust port, the detection space does not reach the smoke sensor. Since the cross section of the airway is narrower,
The smoke introduced into the exhaust duct concentrates in the detection space, and the smoke sensor can effectively detect the smoke. Only
The air path is cut off at the position above the trapezoidal heater cover.
Because the detection space where the surface is narrower than other parts is formed,
Space is used effectively.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment will be described with reference to FIGS. First, FIG. 2 shows the overall configuration of a cooking device, in which a door 2 is provided on the front surface of a cooking device main body 1 so as to be openable and closable, and a control section 3 is disposed on the right side thereof.

As shown in FIGS. 1 and 3, a box-shaped cooking chamber wall 4 having an open front surface is provided inside the cooking device main body 1, and a heating chamber 5 is formed inside the cooking chamber wall 4. On the left and right inner surfaces of the cooking cabinet wall 4, trays 6 for trays are provided in upper and lower stages, respectively. A tray 8 containing food 7 is placed between the rails 6 on both sides to accommodate the food 7 in the heating chamber 5. It is supposed to.

An opening 9 is provided through a top plate of the cooking cabinet wall 4,
This is covered by a heater cover 10 projecting upward and having a trapezoidal cross section. A heater 11 in the left-right direction supported between both side walls is disposed inside the heater cover 10, and an opening 9 is provided.
The food 7 is heated through the heater cover 10, and steam and smoke generated from the food 7 are discharged to the outside of the refrigerator through an exhaust port 12 formed of a number of small holes formed in the center of the front slope of the heater cover 10. .

On the upper side of the cooking cabinet wall 4, a horizontal exhaust duct 13 long in the front-rear direction is disposed so as to cover the exhaust port 12 at the front end thereof, and communicates with the exhaust port 12 in the exhaust duct 13. The exhaust air passage 14 is formed, and a detection space 15 having a narrower air passage cross section than other portions is formed at a position above the heater cover 10 in the exhaust air passage 14.

In this detection space 15, a smoke sensor for detecting smoke introduced into the exhaust duct 13 is provided. That is, this smoke sensor is composed of the light emitting element 16a and the light receiving element 16a.
The two elements 16a and 16b are arranged on both side walls of the exhaust duct 13 in the detection space 15 so as to face each other, and the amount of smoke in the detection space 15 is detected based on the light transmittance.

Reference numeral 17 denotes both elements 16 of the detection space 15.
a, a deodorization catalyst disposed downstream of, or behind, 16b.

As shown in FIG. 1, when the food 7 housed in the heating chamber 5 is cooked with the heater 11 to be browned, steam and smoke generated from the food 7 are removed by arrows shown in FIG. As described above, the gas enters the heater cover 10 through the opening 9, is introduced into the exhaust duct 13 through the exhaust port 12, passes through the detection space 15, is deodorized by the deodorizing catalyst 17, and is then discharged to the outside.

In the smoke sensor installed in the detection space 15,
The light from the light emitting element 16a is received by the light receiving element 16b, and the amount of generated smoke is detected from the received light signal. When this detection level reaches a preset value, the heater 11
Is controlled off immediately or after a certain finishing time.

At this time, the detection space 15 has a narrow air path section, and the smoke introduced into the exhaust duct 13 from the exhaust port 12 is concentrated in the detection space 15. Smoke detection is performed effectively, and detection sensitivity is increased.

Further, since the detection space 15 is disposed on the top plate of the heater cover 10 having the exhaust port 12 on the front slope, even if food juice or the like scatters from the food 7 on the tray 8 to the surroundings, it is heated. Covered by the cover 10, the detection space 1
5 does not adhere to the smoke sensor, and the smoke sensor has light emitting elements 16a arranged on both sides of the exhaust duct 13.
And the light receiving element 16b, it does not hinder the exhaust.

Meanwhile, in an electronically controlled heating cooker such as a microwave oven, when the food is heated after the completion of the heating, the buzzer is driven intermittently after the temperature is heated and heated by low-power microwave oscillation or heater energization. To notify the end of heating.

On the other hand, in recent years, in order to make it easier for a user to confirm the finished state of food being heated, a lamp heater, such as a halogen lamp, which has a value as a light source and a value as a heater, is used as an interior lamp. Is being used. The lamp heater having a power of about 50 W to 100 W is often used. However, since the output is small, the lamp heater is more suitable for keeping heat after the end of heating than for general heating. However, if you only use this lamp heater for keeping warm,
Since the interior lamp remains lit even after the end of the heating, the user may erroneously recognize that the heating is being performed during normal heating.

Although it is possible to notify that the heat is being kept by the intermittent notification of the lighting of the lamp heater and the buzzer sound, it is not possible to use this kind of buzzer sound to intermittently report this from a poor impression of itself. In addition, the buzzer sounds of various electrical products are disturbed by the spread of various types of electrical products in kitchens of ordinary households where this type of cooking device is used. It is not considered a very good method to use the intermittent notification of the sound to notify the user during the warming.

FIGS. 4 and 5 show an example of a heating cooker which solves such a problem. As a notification means, continuous notification is possible, and it is easy and easy to distinguish from other electric appliances. A melody that gives moisture to the place of use together with the impression is used, and the melody sound is generated when the lamp heater is turned on to keep the temperature warm.

That is, as shown in FIG. 4, the heater cover 2 is placed on the ceiling of the cooking chamber wall 19 in which the heating chamber 18 is formed.
0, and a heater 21 is installed on the lamp cover 22. A lamp cover 22 is provided on the ceiling in front of the heater cover 20.
, And a small-output lamp heater 23 composed of a halogen lamp of 200 W or less is installed thereon. Reference numeral 24 denotes a turntable on which the food 25 is placed, which is rotated by a turntable motor 26. The cooking device is controlled by a control circuit using a microcomputer.

FIG. 5 is a flowchart showing a processing program of the microcomputer. When a desired heating course is inputted by a key on an operation panel provided on a front surface of the cooking device main body and a start key is operated by a key, the heating is started. At the start, for example, in the case of oven heating by the heater 21, the heater 21 and the motor 26 are driven, the turntable 24 on which the food 25 is placed is rotated, and the food 25 is uniformly and uniformly heated. At this time, the lamp heater 23 is also driven to make it easier to confirm the finished state of the food 25 being heated.

When the set time has elapsed in this state, the heating is completed, the heater 21 and the motor 26 are turned off, and thereafter, the timer TM for the maximum heat retention time is set.
The melody generating device disposed on the operation unit or the like is driven to output a melody sound and notify the user of the end of the heating. At this time,
The lamp heater 23 remains lit, and the food 25
Is kept warm. When the key is pressed during the heat retention, the melody generator is stopped, and the lamp heater 23 is also stopped.

When the door is opened for taking out the food 25, the melody generating device is stopped in response to a signal from the detecting means, and when the taking out of the food 25 is completed and the door is closed, the detection signal is outputted. Lamp heater 23
Is turned off. Further, if the key operation of the stop key and the opening operation of the door are not performed even after the maximum heat retention time set in the timer TM has elapsed, the melody and the lamp heater 23 are sequentially turned off, and the buzzer is driven. Notify the user.

[0029]

[Effects of the Invention] Since the present invention is configured as described above, the following effects can be obtained. A detection space with a narrower air path section than other parts was formed in the middle of the exhaust duct communicating with the heating chamber, and smoke generated from food and introduced into the exhaust duct was concentrated in this detection space and installed there. Since the smoke sensor can detect smoke effectively, it is possible to control the drive of the heater according to the heating state of the food, and obtain a stable finish against changes in various conditions such as freshness of the food and water content. It is something that can be done.

Moreover, since the smoke sensor is installed in the detection space in the middle of the exhaust duct, it is possible to prevent a user from directly touching the sensor and also to ensure that food juice and the like adhere to the sensor through the exhaust port. Can be prevented.
In addition, the wind above the trapezoidal heater cover
The detection space where the road cross section is narrower than other parts is formed.
Therefore, the space can be used effectively.

[Brief description of the drawings]

FIG. 1 is a cut-away side view showing an embodiment of a heating cooker according to the present invention.

FIG. 2 is an overall perspective view of the cooking device.

FIG. 3 is a plan view of FIG. 1;

FIG. 4 is a cut-away side view of a heating cooker that maintains heat by a lamp heater.

FIG. 5 is a flowchart for explaining the operation of FIG. 4;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cooker main body 5 Heating chamber 7 Food 11 Heater 12 Exhaust port 13 Exhaust duct 15 Detection space 16a Light emitting element 16b Light receiving element

Claims (1)

(57) [Scope of request for utility model registration] And 1. A heating chamber for accommodating food, covering the opening of the top plate of the heating chamber, trapezoidal projecting upward
A heater cover shape, are disposed in the heater within the cover, a heater for heating the food through the opening, said the upper side of the heating chamber Hitaka
An exhaust duct arranged in a direction intersecting the bar and communicating with an exhaust port on a ceiling, and an exhaust air path of the exhaust duct above the heater cover.
Smoke is the formed position, and sensing space air passage cross-section is not narrower than the other portion, are arranged face-to-face in the monitor space, and controls the driving of the heater by detecting the smoke introduced into said exhaust duct A heating cooker provided with a light emitting element and a light receiving element of a sensor.